Electromagnetic apparatus intended to magnetize permanent magnets



A.LUZY. ELECYTROMAGNETIG APPABATusJNTENm-:n To MAGNETIZE PERMANENT MAGNETS.

, APPLICATION FILED NOV. 22, 1919. 1,398,526.

a Inven'tbr Patented Nov. 29, 1921.

Figi

PATENT OFFICE. i*

UNITED STATES ANTOINE LUZY, OF PARIS, FRANCE.

Application led November 22, 1919.

To all 1li/omit may concern: A

Be it known that I, ANTOINE LUZY, a citizen of the French Republic, and resident of 34 Rue Sorbier, Paris, France, have invented certain new and useful Improvements in Electromagnetic Apparatus Intended l to Magnetize Permanent Magnets, (for which I have iiled application in France Feb. 1, 1918,) of which the following is a specification.

The present invention relates to an electromagnetic apparatus intended to magnetize multipolar monobloc permanent magnets with alternate poles.

In this apparatus are combined the following :-1st, one or more than one electromagnet: 2nd, two different mechanical members some formed with fixed or movable polar extremities, the other forming one or more than one yoke so as to permit of the position of the electro-magnets being varied, the object of these two kinds of members being to adapt the magnetizing apparatus to different sizes of magnets. l

The apparatus may be varied relatively to the number of electro-magnets which it con tains, for example in the form of the polar extremities, the manner of mounting the electro-magnets on their yoke.

The accompanying drawing illustrates by way of example constructions in accordance with the present invention.

Figure l is a side elevation of the apparatus for magnetizing the multipolar magnets,

Fig. la is a top plan of the apparatus,

Figs. 2 and 2a represent side. and `top views, respectively, of a modification of the magnetizing apparatus,

Figs. 3 and 3a represent side and top views, respectively of a further modification of the magnetizing apparatus,

Fig. 4 is a top plan of a further modification of the further modification of the apparatus.

Fig. l shows an arrangement of bi-polar electro-magnet having two inductive windings, which can be employed in the magnetization of any suitable number of monobloc multipolar magnets, but mainly for magnets of small dimensions and of limited number.

In the polar extremities of the soft iron cores l and 2 are provided with extensions formed by bars of soft iron 3 and 4, maintained in position by the screws 5, 6 in such Specification of Letters Patent.

Patented Nev. 2a, 192i.

Serial N0. 340,069.

manner that the bars can be displaced horizont-ally while pivoting aboutv the screw which secures them and so that their` free extremities can approach or recede from each other, in order to take magnets of dii'- 'erent sizes. The bars 3 and 4 are intended to canalize the magnetic flux of the electromagnet and to screen the piece 7 to be netized from radiating flux which would tend to cause the formation of accidental polarities in the branches which are not in contact with the bars 3 and 4.

Figs. 2 and 2n represent an arrangement of electro-magnet specially designed to magnetize the permanent monobloc magnets of a four pole arrangement, like the magnet 8, which is placed directly on the ends of the cores 9, l0, ll and l2. In order that the arrangement therein shown may take magnets of different sizes, the lower ends of the cores engage in slots 13, 14, l5, 16 forming guides in the base piece, so that it is possible by moving the inductive coils to place them closer to or farther from the center of the apparatus.

Figs. 3 and 3a show further arrangement of' electro-magnet for use in magnetizing tetrapolar monobloc magnets in which the cores of the bobbins are immovable in the slots.V This arrangement is equally convenient for magnetizing magnets of different sizes. For this purpose the upper ends 17, 18, 19 and 2() of the cores are provided with rectangularl slots in which the iron bars 21, 22, 23 and 24 slide and adapted to be rigidly fixed by any suitable means. According to its dimensions the piece to be magnetized is placed on the bars or surrounded by the bobbins or on the bars outside the bobbins as shown in dotted lines at 26, 27 in Fig. 3.

Fig. 4 shows a further arrangement of electro-magnet for magnetizing tetrapolar magnets. Four v inductive bobbins are mounted radially in a circular or circums :ferential armature 29, the cores 30, 3l, 32 and 33 of the bobbins being displaceable parallel to their axes in a direction toward and from the center of the arrangement; the said cores can be fixed by any suitable and convenient means. The piece 34 to be magnetized is placed at the center of the arrangement and on the polar ends of the cores.

The arrangement shown in Figs. 2, 3 and 4 can be varied in form and comprise all the accessory members necessary tovary the distance which separates the polar ends in order to take magnets of any desired dimensions. The arrangements may comprise any suitable number of inductive bobbins and pairs of cores; it may even be employed to magnetize multipolar magnets having any suitable numberv of pairsv of poles, consecutiveY poles of the same magnet beingpositive and negative alternately, that is north and south, if the windings on the inductive vbobbins are disposed'tofthis effect, the free polar ends of the cores vmay themselves be'magnetized alternative negative and positive z'. e. south and north.

The advantages of the present invention will be apparent if it be considered that the l Y manufacture of :monobloc multipolar 'per-y manent magnets with alternate poles Vhas hitherto been considered an` impossibility. These magnets can 'be employed Vfor the same purpose as bipolai` magnets and further they can create new types ofapparatus such as magneto machines with movable magnets,

electric measuring apparatus,telephonic ap@ f paratus, portable electricilighting apparatus, apparatus for the measurementof'time,'in signaling and'other purposes andperhaps in new and improved applications inV th actual state of the industry. Y

The `monobloc multipolar magnets can,

Vlike 1iii-polar magnets, form very powerful Vcompound or composite magnets Yby groupinfr or super position.

--Iaving `now particularly described and ascertained the nature of my` said inventionand in what manner the samepis `tobe performed, I declare that WhatxlI ,claimiszl. In an apparatus for magnetizing monobloc multipolar magnets havingalternating poles, a base, electromagnets on said basefhaving differentipolarities fand solid cores projecting fromtheelectromagnets on which are applied the corresponding ends of the monobloc magnet. f

2. In an apparatus V:tor magnetizing'monobloc permanent magnets'having alternating poles, a base, a group of electromagnetsbn said ibase fvhaving alternating -polarities, cores in said electromagnets on'which are simultaneously appliedv Athe corresponding ends of the magnet, and means fory adjusting -saidelectromagnets radially of the center of the base whereby to vary the relative positions ofthe `polarized surface on which the poles of the magnet are applied.

Y3. In anY apparatus lfor magnetizing monobloc permanent magnets having alternating poles, '-a base provided with diametral grooves radiatingirom the center thereof,

electromagnets onv said base having alternating polarities, coresV in saidV electromagnets Y on. which are simultaneously applied the;

corresponding Vends of the magnet, and means for Lmoving the electromagnets and their cores radiallyrin'said grooves.

4. In an apparatus for magnetizing mon# obloc permanent magnets having alternat-V inglpoles, a base provided'with diametral groove-s, electromagnets Ahaving alternating Y polarities, cores in said electromagnets, the

nets and their cores-being movable radiali?! `in their grooves, and rods slidable perpenf dicular to the axis of the said cores to permit ofthe application thereto 'of the correspondin@ endsof the magnet.VVV v n testiinony whereof I have j-signe'd my Y name to this specicationin the Vpresence of Y a subscribing Witness. Y

ANTOINE IiUZYf l VWitness; y'

CHAs. P. 'PRiissLYg 

